CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities
Net income	$ 1,503.1	$ 823.4	$ 1,046.9
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	134.8	107.2	89.3
Non-cash operating lease cost	28.5	28.2	25.3
Stock-based compensation (Notes 2 and 14)	109.3	92.6	81.3
Inventory write off (Note 2)	0.0	0.0	73.1
Impairment charges (Note 4)	0.0	0.0	40.6
Change in fair value of contingent consideration liabilities, net (Note 11)	(124.1)	13.6	(6.1)
Deferred income taxes	(41.4)	(49.4)	12.1
Purchased in-process research and development (Note 4)	0.0	0.0	24.0
Other	(23.4)	(3.5)	(2.8)
Changes in operating assets and liabilities:
Accounts and other receivables, net	(91.1)	41.9	(88.0)
Inventories	19.0	(120.6)	(105.4)
Prepaid expenses and other current assets	7.9	(28.5)	(6.8)
Accounts payable and accrued liabilities	195.2	(84.5)	116.5
Litigation settlement accrual	(29.2)	270.5	(180.0)
Income taxes	62.0	(52.9)	43.2
Other	(18.5)	16.3	19.7
Net cash provided by operating activities	1,732.1	1,054.3	1,182.9
Cash flows from investing activities
Capital expenditures	(325.8)	(407.0)	(254.4)
Purchases of held-to-maturity investments (Note 7)	(250.0)	(162.0)	(130.2)
Proceeds from sales and maturities of held-to-maturity investments (Note 7)	138.0	212.2	50.0
Purchases of available-for-sale investments (Note 7)	(1,629.3)	(689.7)	(437.9)
Proceeds from sales and maturities of available-for-sale investments (Note 7)	391.2	564.8	359.9
Acquisition (Note 8)	0.0	0.0	(100.2)
Payment for acquisition option	(13.1)	(10.0)	(35.0)
Issuances of notes receivable	(5.1)	(27.0)	(12.9)
Collections of notes receivable	20.0	0.0	0.0
Investments in intangible assets and in-process research and development	(4.0)	(0.3)	(24.0)
Other	(44.4)	(12.1)	(11.1)
Net cash used in investing activities	(1,722.5)	(531.1)	(595.8)
Cash flows from financing activities
Proceeds from issuance of debt	5.2	16.2	18.9
Payments on debt and finance lease obligations	(7.0)	(17.0)	(28.9)
Purchases of treasury stock	(512.8)	(625.4)	(263.3)
Proceeds from stock plans	158.6	140.5	160.5
Other	(0.3)	(1.2)	(2.8)
Net cash used in financing activities	(356.3)	(486.9)	(115.6)
Effect of currency exchange rate changes on cash, cash equivalents, and restricted cash	13.9	(20.5)	(3.0)
Net (decrease) increase in cash, cash equivalents, and restricted cash	(332.8)	15.8	468.5
Cash, cash equivalents, and restricted cash at beginning of year	1,200.2	1,184.4	715.9
Cash, cash equivalents, and restricted cash at end of year	$ 867.4	$ 1,200.2	$ 1,184.4

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Amount of cash outflow through purchase of long-term held-to-maturity securities.

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The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill.

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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The cash inflow associated with principal collections from a borrowing supported by a written promise to pay an obligation.

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Amount of cash inflow from sale, maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of cash inflow from the sale or maturity of long-term held-to-maturity securities.

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Amount of noncash expense for share-based payment arrangement.

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